Rod coupling



Patented Aug. 8, 1939 UNITEDSTATES PATENT ori-ICE ROD COUPLING n I PeterR. Betzing, Los Angeles, Calif. Application October 24, 1938, Serial No.236,697

5 Claims. (C1. 287-104) Thisinvention relates to couplings, particularlyrod couplings. The invention is particularly designed to provide acoupling for rods having small diameter such as are used as clean-outrods for 5 plumbing.

It is a primary object of this invention to provide a couplingconstruction for joining various types of rods o'r the like but which isparticularly designed to form a rod coupling for joining cleanl out roddebris and stoppages from plumbing. It is an object of this inventiontoprovide such-a rod couplingv which -will withstand the tension, torqueand compression stresses to which such clean-out-rods are subjected, f

It; is also an object of this invention to provide a rod coupling whichmay be easily and quickly assembled or disassembled when Adesired and,if necessary, without'the use 0I" tools.

It is a further object of this invention to pro- 20 vide a rod couplingwhich will not come apart or permit the accidental separation of therods when rods are being used in a pipe in a oleanout operation in theevent that the threaded members of the coupling should become un- 25screwed and part.

It is a further object of this invention to provide a rod coupling whichis inexpensive to manufacture in which the parts are of durableconstruction and few in number 30 These and other objects will beapparent from the drawing and description thereof. Referring to thedrawing which is for illustrative purposes only;

Fig. 1 is a longitudinal sectional elevation of the coupling of thisinvention;

Fig. 2 is a transverse section of the coupling taken on the line 2 2 ofFig. 1; and

Fig. 3 is a sectional elevation of the main body member of the couplingand an elevation of 4o one rod and the bushing in position prior toassembly.

More particularly describing the invention, reference numeral IIindicates one of two rods to be joined by the coupling means, while ref-45 erence numeral I2 indicates the other rod, A thimble or coupling bodymember I3 is provided which has a reduced apertured end Ill adapted toslidably accommodate the rod II. The thimble I3 is hollow and isprovided with an internally 50 threaded portion I5. Extendingtransversely of the member I3 and mounted therein in any suitable manneris an anchor pin I6.

Each of the rods II and I2 is provided with an offset curved orpartially-hooked end portion 55 (I I and I2) which is adapted to extendpartially Cil around the anchor pin and engage the anchor pin on theside opposite the main portion of the rod. The thimble I3 is providedwith oppositely disposed longitudinally extending grooves I'I and I Iwhich are adapted to accommodate the offset 5 end portions of the tworods as indicated in Fig. 1.

It is tobe understood that the thimble I3 is preferably permanentlymounted upon the rod I I and this is accomplished by nrsi; sliding therod through the thimble until the offset portion II' l0 enters thethimble in the groove I'I' and occupies the position in which it isshown in the drawing.

'I'he pin I6 is then secured in place in any suitable manner therebysecuring the rod and thimble to prevent relative movement of the twoparts. It is not essential to the invention that the thimble and rod IIbe secured together as shown and any suitable means might be employedfor this purpose.

When it is desired to couple the rod I2 tothe 20 rod II this isaccomplished by inserting the end I2 of the rod I2 into the thimble bysliding the end in the groove I 'I and at the same time maintaining therod out of alignment with rod II and at a substantial angle thereto asshown in Fig. 3. In this position the oiset and partially hooked endportion I2 of the rod may be inserted past the anchor pin. The rod I2 isthen aligned with the rod II and a bushing I8, which is slidably mountedon the rod I2, is threaded into the threaded portion I5 of the thimbleI3 serving to maintain the rod I2 in alignment and secure the Same inthe thimble.

It should be apparent that when the rod I2 is in alignment with the rodII or disposed at only a slight angle to the coupling the onset endportion of the rod will engage the side of the anchor pin opposite tothat on which the main body of the rod lies and thereby prevent theseparation of the rod I2 and the member I3. 40 In this connection itshould be apparent that if the bushing I8 becomes unscrewed from memberI3 when the coupling is being used in a sectional clean-out rod for theoperation of cleaning out pipes the coupling will not come apart for thereason that the rod sections are usually made in at least ve foot lengthsections and that in the diameter pipe in which such clean-out sectionsare used it is impossible for the rod to become suinciently angularlyoiset with relation to the Icoupling to permit the oiset end of the rodto pass the anchor pin.

Although a particular form of the invention has been shown and describedit is contemplated that certain changes might be made without departingfrom the scope of the invention and it is intended to cover such changesand modifications as come Within the scope of the claims.

I claim as my invention:

l. A rod coupling comprising a rod; a coupling thimble mounted on theend of said rod; a pin rigidly mounted in said thimble transverselythereof; a second rod having an offset end portion within said thimbleengaging said pin on the side of said pin opposite to the main portionof the rod and means cooperating with said thimble for holding saidsecond rod in alignment with said rst mentioned rod.

2. A rod coupling comprising: a rod; a thimble mounted on the end ofsaid rod, said thimble having an internally threaded end portion; a pinrigidly mounted in said thimble transversely thereof; a second rodhaving an olfset end portion engaging said pin on the side of said pinopposite to the main portion of the rod; said pin and said thimblecooperating to provide sufficient clearance for the end portion of saidsecond rod to pass said pin only when said second rod is disposed at asubstantial angle to the longitudinal axis of said thimble; and abushing on said second rod threadably engaging the threaded end portionof said thimble and serving to hold said second rod in substantialalignment with said rst rod.

3. A rod coupling comprising: a rod; a thimble mounted on the end ofsaid rod, said thimble having an internally threaded end portion andhaving an internal longitudinal groove; an anchor pin rigidly mounted insaid thimble transversely thereof; a second rod having an oiset endportion extending into said thimble, the end portion of said rodengaging said groove and engaging said pin on the side of said pinopposite to the main portion of the rod; said groove and said pinproviding sufficient clearance for the end portion of said second rod topass said pin only when said second rod is disposed at a substantialangle to the longitudinal axisl of said thimble; and a bushing on saidsecond rod threaded into said thimble and adapted to align said secondrod with said first mentioned rod.

4. A rod coupling comprising: a rod; a thimble mounted on the end ofsaid rod, said thimble having an internally threaded end portion andhaving an internal longitudinal groove; an anchor pin rigidly mounted insaid thimble transversely thereof; a second rod having an offset endportion extending into said thimble, the end portion of said rodengaging said groove and engaging said pin on the side of said pinopposite to the main portion of the rod, the offset end portion of saidsecond rod being so formed as to permit insertion and removal of samepast said pin only when said second rod is disposed at a substantialangle to the longitudinal axis of said thimble; and a bushing on saidsecond rod threaded into said thimble and adapted to align said secondrod with said first mentioned rod.

5. A rod coupling comprising: a rod having an offset partially hookedend portion; a second 1 rod having an offset partially hooked endportion; a thimble adapted to accommodate said ends of said rods, saidthimble having two oppositely disposed internal grooves; an anchor pinrigidly mounted in said thimble transversely z;v

thereof; the ends of said rods extending into respective grooves andrespectively engaging said pin on the side of said pin opposite to themain portion of the respective rods; and detachable means cooperatingwith said thimble for holding

